diff options
27 files changed, 1365 insertions, 303 deletions
diff --git a/Documentation/devicetree/bindings/thermal/qcom-spmi-temp-alarm.txt b/Documentation/devicetree/bindings/thermal/qcom-spmi-temp-alarm.txt index 290ec06fa33a..0273a92a2a84 100644 --- a/Documentation/devicetree/bindings/thermal/qcom-spmi-temp-alarm.txt +++ b/Documentation/devicetree/bindings/thermal/qcom-spmi-temp-alarm.txt @@ -6,8 +6,7 @@ interrupt signal and status register to identify high PMIC die temperature. Required properties: - compatible: Should contain "qcom,spmi-temp-alarm". -- reg: Specifies the SPMI address and length of the controller's - registers. +- reg: Specifies the SPMI address. - interrupts: PMIC temperature alarm interrupt. - #thermal-sensor-cells: Should be 0. See thermal.txt for a description. @@ -20,7 +19,7 @@ Example: pm8941_temp: thermal-alarm@2400 { compatible = "qcom,spmi-temp-alarm"; - reg = <0x2400 0x100>; + reg = <0x2400>; interrupts = <0 0x24 0 IRQ_TYPE_EDGE_RISING>; #thermal-sensor-cells = <0>; @@ -36,19 +35,14 @@ Example: thermal-sensors = <&pm8941_temp>; trips { - passive { - temperature = <1050000>; + stage1 { + temperature = <105000>; hysteresis = <2000>; type = "passive"; }; - alert { + stage2 { temperature = <125000>; hysteresis = <2000>; - type = "hot"; - }; - crit { - temperature = <145000>; - hysteresis = <2000>; type = "critical"; }; }; diff --git a/Documentation/devicetree/bindings/thermal/qoriq-thermal.txt b/Documentation/devicetree/bindings/thermal/qoriq-thermal.txt index 20ca4ef9d776..04cbb90a5d3e 100644 --- a/Documentation/devicetree/bindings/thermal/qoriq-thermal.txt +++ b/Documentation/devicetree/bindings/thermal/qoriq-thermal.txt @@ -1,9 +1,9 @@ * Thermal Monitoring Unit (TMU) on Freescale QorIQ SoCs Required properties: -- compatible : Must include "fsl,qoriq-tmu". The version of the device is - determined by the TMU IP Block Revision Register (IPBRR0) at - offset 0x0BF8. +- compatible : Must include "fsl,qoriq-tmu" or "fsl,imx8mq-tmu". The + version of the device is determined by the TMU IP Block Revision + Register (IPBRR0) at offset 0x0BF8. Table of correspondences between IPBRR0 values and example chips: Value Device ---------- ----- diff --git a/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt index cfa154bb0fa7..ad9a435afef4 100644 --- a/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt +++ b/Documentation/devicetree/bindings/thermal/rcar-gen3-thermal.txt @@ -7,9 +7,11 @@ inside the LSI. Required properties: - compatible : "renesas,<soctype>-thermal", Examples with soctypes are: + - "renesas,r8a774a1-thermal" (RZ/G2M) - "renesas,r8a7795-thermal" (R-Car H3) - "renesas,r8a7796-thermal" (R-Car M3-W) - "renesas,r8a77965-thermal" (R-Car M3-N) + - "renesas,r8a77980-thermal" (R-Car V3H) - reg : Address ranges of the thermal registers. Each sensor needs one address range. Sorting must be done in increasing order according to datasheet, i.e. @@ -19,7 +21,8 @@ Required properties: Optional properties: -- interrupts : interrupts routed to the TSC (3 for H3, M3-W and M3-N) +- interrupts : interrupts routed to the TSC (3 for H3, M3-W, M3-N, + and V3H) - power-domain : Must contain a reference to the power domain. This property is mandatory if the thermal sensor instance is part of a controllable power domain. diff --git a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt index 67c563f1b4c4..73e1613d2cb0 100644 --- a/Documentation/devicetree/bindings/thermal/rcar-thermal.txt +++ b/Documentation/devicetree/bindings/thermal/rcar-thermal.txt @@ -4,15 +4,17 @@ Required properties: - compatible : "renesas,thermal-<soctype>", "renesas,rcar-gen2-thermal" (with thermal-zone) or "renesas,rcar-thermal" (without thermal-zone) as - fallback except R-Car D3. + fallback except R-Car V3M/D3. Examples with soctypes are: - "renesas,thermal-r8a73a4" (R-Mobile APE6) - "renesas,thermal-r8a7743" (RZ/G1M) + - "renesas,thermal-r8a7744" (RZ/G1N) - "renesas,thermal-r8a7779" (R-Car H1) - "renesas,thermal-r8a7790" (R-Car H2) - "renesas,thermal-r8a7791" (R-Car M2-W) - "renesas,thermal-r8a7792" (R-Car V2H) - "renesas,thermal-r8a7793" (R-Car M2-N) + - "renesas,thermal-r8a77970" (R-Car V3M) - "renesas,thermal-r8a77995" (R-Car D3) - reg : Address range of the thermal registers. The 1st reg will be recognized as common register @@ -21,7 +23,7 @@ Required properties: Option properties: - interrupts : If present should contain 3 interrupts for - R-Car D3 or 1 interrupt otherwise. + R-Car V3M/D3 or 1 interrupt otherwise. Example (non interrupt support): diff --git a/Documentation/devicetree/bindings/thermal/stm32-thermal.txt b/Documentation/devicetree/bindings/thermal/stm32-thermal.txt new file mode 100644 index 000000000000..8c0d5a4d8031 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/stm32-thermal.txt @@ -0,0 +1,61 @@ +Binding for Thermal Sensor for STMicroelectronics STM32 series of SoCs. + +On STM32 SoCs, the Digital Temperature Sensor (DTS) is in charge of managing an +analog block which delivers a frequency depending on the internal SoC's +temperature. By using a reference frequency, DTS is able to provide a sample +number which can be translated into a temperature by the user. + +DTS provides interrupt notification mechanism by threshold. This mechanism +offers two temperature trip points: passive and critical. The first is intended +for passive cooling notification while the second is used for over-temperature +reset. + +Required parameters: +------------------- + +compatible: Should be "st,stm32-thermal" +reg: This should be the physical base address and length of the + sensor's registers. +clocks: Phandle of the clock used by the thermal sensor. + See: Documentation/devicetree/bindings/clock/clock-bindings.txt +clock-names: Should be "pclk" for register access clock and reference clock. + See: Documentation/devicetree/bindings/resource-names.txt +#thermal-sensor-cells: Should be 0. See ./thermal.txt for a description. +interrupts: Standard way to define interrupt number. + +Example: + + thermal-zones { + cpu_thermal: cpu-thermal { + polling-delay-passive = <0>; + polling-delay = <0>; + + thermal-sensors = <&thermal>; + + trips { + cpu_alert1: cpu-alert1 { + temperature = <85000>; + hysteresis = <0>; + type = "passive"; + }; + + cpu-crit: cpu-crit { + temperature = <120000>; + hysteresis = <0>; + type = "critical"; + }; + }; + + cooling-maps { + }; + }; + }; + + thermal: thermal@50028000 { + compatible = "st,stm32-thermal"; + reg = <0x50028000 0x100>; + clocks = <&rcc TMPSENS>; + clock-names = "pclk"; + #thermal-sensor-cells = <0>; + interrupts = <GIC_SPI 147 IRQ_TYPE_LEVEL_HIGH>; + }; diff --git a/Documentation/devicetree/bindings/thermal/thermal.txt b/Documentation/devicetree/bindings/thermal/thermal.txt index eb7ee91556a5..ca14ba959e0d 100644 --- a/Documentation/devicetree/bindings/thermal/thermal.txt +++ b/Documentation/devicetree/bindings/thermal/thermal.txt @@ -152,7 +152,7 @@ Optional property: Elem size: one cell the sensors listed in the thermal-sensors property. Elem type: signed Coefficients defaults to 1, in case this property is not specified. A simple linear polynomial is used: - Z = c0 * x0 + c1 + x1 + ... + c(n-1) * x(n-1) + cn. + Z = c0 * x0 + c1 * x1 + ... + c(n-1) * x(n-1) + cn. The coefficients are ordered and they match with sensors by means of sensor ID. Additional coefficients are diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 0e69edc77d18..5422523c03f8 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -432,7 +432,7 @@ source "drivers/thermal/samsung/Kconfig" endmenu menu "STMicroelectronics thermal drivers" -depends on ARCH_STI && OF +depends on (ARCH_STI || ARCH_STM32) && OF source "drivers/thermal/st/Kconfig" endmenu diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 610344eb3e03..82bb50dc6423 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -53,7 +53,7 @@ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal/ obj-$(CONFIG_INTEL_BXT_PMIC_THERMAL) += intel_bxt_pmic_thermal.o obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o -obj-$(CONFIG_ST_THERMAL) += st/ +obj-y += st/ obj-$(CONFIG_QCOM_TSENS) += qcom/ obj-y += tegra/ obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c index 2c2f6d93034e..92f67d40f2e9 100644 --- a/drivers/thermal/armada_thermal.c +++ b/drivers/thermal/armada_thermal.c @@ -526,8 +526,8 @@ static int armada_thermal_probe_legacy(struct platform_device *pdev, /* First memory region points towards the status register */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (IS_ERR(res)) - return PTR_ERR(res); + if (!res) + return -EIO; /* * Edit the resource start address and length to map over all the diff --git a/drivers/thermal/da9062-thermal.c b/drivers/thermal/da9062-thermal.c index dd8dd947b7f0..01b0cb994457 100644 --- a/drivers/thermal/da9062-thermal.c +++ b/drivers/thermal/da9062-thermal.c @@ -106,7 +106,7 @@ static void da9062_thermal_poll_on(struct work_struct *work) THERMAL_EVENT_UNSPECIFIED); delay = msecs_to_jiffies(thermal->zone->passive_delay); - schedule_delayed_work(&thermal->work, delay); + queue_delayed_work(system_freezable_wq, &thermal->work, delay); return; } @@ -125,7 +125,7 @@ static irqreturn_t da9062_thermal_irq_handler(int irq, void *data) struct da9062_thermal *thermal = data; disable_irq_nosync(thermal->irq); - schedule_delayed_work(&thermal->work, 0); + queue_delayed_work(system_freezable_wq, &thermal->work, 0); return IRQ_HANDLED; } diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c index 761d0559c268..c4111a98f1a7 100644 --- a/drivers/thermal/hisi_thermal.c +++ b/drivers/thermal/hisi_thermal.c @@ -55,25 +55,39 @@ #define HI3660_TEMP_STEP (205) #define HI3660_TEMP_LAG (4000) -#define HI6220_DEFAULT_SENSOR 2 -#define HI3660_DEFAULT_SENSOR 1 +#define HI6220_CLUSTER0_SENSOR 2 +#define HI6220_CLUSTER1_SENSOR 1 + +#define HI3660_LITTLE_SENSOR 0 +#define HI3660_BIG_SENSOR 1 +#define HI3660_G3D_SENSOR 2 +#define HI3660_MODEM_SENSOR 3 + +struct hisi_thermal_data; struct hisi_thermal_sensor { + struct hisi_thermal_data *data; struct thermal_zone_device *tzd; + const char *irq_name; uint32_t id; uint32_t thres_temp; }; +struct hisi_thermal_ops { + int (*get_temp)(struct hisi_thermal_sensor *sensor); + int (*enable_sensor)(struct hisi_thermal_sensor *sensor); + int (*disable_sensor)(struct hisi_thermal_sensor *sensor); + int (*irq_handler)(struct hisi_thermal_sensor *sensor); + int (*probe)(struct hisi_thermal_data *data); +}; + struct hisi_thermal_data { - int (*get_temp)(struct hisi_thermal_data *data); - int (*enable_sensor)(struct hisi_thermal_data *data); - int (*disable_sensor)(struct hisi_thermal_data *data); - int (*irq_handler)(struct hisi_thermal_data *data); + const struct hisi_thermal_ops *ops; + struct hisi_thermal_sensor *sensor; struct platform_device *pdev; struct clk *clk; - struct hisi_thermal_sensor sensor; void __iomem *regs; - int irq; + int nr_sensors; }; /* @@ -266,30 +280,40 @@ static inline void hi6220_thermal_hdak_set(void __iomem *addr, int value) (value << 4), addr + HI6220_TEMP0_CFG); } -static int hi6220_thermal_irq_handler(struct hisi_thermal_data *data) +static int hi6220_thermal_irq_handler(struct hisi_thermal_sensor *sensor) { + struct hisi_thermal_data *data = sensor->data; + hi6220_thermal_alarm_clear(data->regs, 1); return 0; } -static int hi3660_thermal_irq_handler(struct hisi_thermal_data *data) +static int hi3660_thermal_irq_handler(struct hisi_thermal_sensor *sensor) { - hi3660_thermal_alarm_clear(data->regs, data->sensor.id, 1); + struct hisi_thermal_data *data = sensor->data; + + hi3660_thermal_alarm_clear(data->regs, sensor->id, 1); return 0; } -static int hi6220_thermal_get_temp(struct hisi_thermal_data *data) +static int hi6220_thermal_get_temp(struct hisi_thermal_sensor *sensor) { + struct hisi_thermal_data *data = sensor->data; + return hi6220_thermal_get_temperature(data->regs); } -static int hi3660_thermal_get_temp(struct hisi_thermal_data *data) +static int hi3660_thermal_get_temp(struct hisi_thermal_sensor *sensor) { - return hi3660_thermal_get_temperature(data->regs, data->sensor.id); + struct hisi_thermal_data *data = sensor->data; + + return hi3660_thermal_get_temperature(data->regs, sensor->id); } -static int hi6220_thermal_disable_sensor(struct hisi_thermal_data *data) +static int hi6220_thermal_disable_sensor(struct hisi_thermal_sensor *sensor) { + struct hisi_thermal_data *data = sensor->data; + /* disable sensor module */ hi6220_thermal_enable(data->regs, 0); hi6220_thermal_alarm_enable(data->regs, 0); @@ -300,16 +324,18 @@ static int hi6220_thermal_disable_sensor(struct hisi_thermal_data *data) return 0; } -static int hi3660_thermal_disable_sensor(struct hisi_thermal_data *data) +static int hi3660_thermal_disable_sensor(struct hisi_thermal_sensor *sensor) { + struct hisi_thermal_data *data = sensor->data; + /* disable sensor module */ - hi3660_thermal_alarm_enable(data->regs, data->sensor.id, 0); + hi3660_thermal_alarm_enable(data->regs, sensor->id, 0); return 0; } -static int hi6220_thermal_enable_sensor(struct hisi_thermal_data *data) +static int hi6220_thermal_enable_sensor(struct hisi_thermal_sensor *sensor) { - struct hisi_thermal_sensor *sensor = &data->sensor; + struct hisi_thermal_data *data = sensor->data; int ret; /* enable clock for tsensor */ @@ -345,10 +371,10 @@ static int hi6220_thermal_enable_sensor(struct hisi_thermal_data *data) return 0; } -static int hi3660_thermal_enable_sensor(struct hisi_thermal_data *data) +static int hi3660_thermal_enable_sensor(struct hisi_thermal_sensor *sensor) { unsigned int value; - struct hisi_thermal_sensor *sensor = &data->sensor; + struct hisi_thermal_data *data = sensor->data; /* disable interrupt */ hi3660_thermal_alarm_enable(data->regs, sensor->id, 0); @@ -371,21 +397,8 @@ static int hi6220_thermal_probe(struct hisi_thermal_data *data) { struct platform_device *pdev = data->pdev; struct device *dev = &pdev->dev; - struct resource *res; int ret; - data->get_temp = hi6220_thermal_get_temp; - data->enable_sensor = hi6220_thermal_enable_sensor; - data->disable_sensor = hi6220_thermal_disable_sensor; - data->irq_handler = hi6220_thermal_irq_handler; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->regs = devm_ioremap_resource(dev, res); - if (IS_ERR(data->regs)) { - dev_err(dev, "failed to get io address\n"); - return PTR_ERR(data->regs); - } - data->clk = devm_clk_get(dev, "thermal_clk"); if (IS_ERR(data->clk)) { ret = PTR_ERR(data->clk); @@ -394,11 +407,14 @@ static int hi6220_thermal_probe(struct hisi_thermal_data *data) return ret; } - data->irq = platform_get_irq(pdev, 0); - if (data->irq < 0) - return data->irq; + data->sensor = devm_kzalloc(dev, sizeof(*data->sensor), GFP_KERNEL); + if (!data->sensor) + return -ENOMEM; - data->sensor.id = HI6220_DEFAULT_SENSOR; + data->sensor[0].id = HI6220_CLUSTER0_SENSOR; + data->sensor[0].irq_name = "tsensor_intr"; + data->sensor[0].data = data; + data->nr_sensors = 1; return 0; } @@ -407,38 +423,34 @@ static int hi3660_thermal_probe(struct hisi_thermal_data *data) { struct platform_device *pdev = data->pdev; struct device *dev = &pdev->dev; - struct resource *res; - data->get_temp = hi3660_thermal_get_temp; - data->enable_sensor = hi3660_thermal_enable_sensor; - data->disable_sensor = hi3660_thermal_disable_sensor; - data->irq_handler = hi3660_thermal_irq_handler; + data->nr_sensors = 2; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - data->regs = devm_ioremap_resource(dev, res); - if (IS_ERR(data->regs)) { - dev_err(dev, "failed to get io address\n"); - return PTR_ERR(data->regs); - } + data->sensor = devm_kzalloc(dev, sizeof(*data->sensor) * + data->nr_sensors, GFP_KERNEL); + if (!data->sensor) + return -ENOMEM; - data->irq = platform_get_irq(pdev, 0); - if (data->irq < 0) - return data->irq; + data->sensor[0].id = HI3660_BIG_SENSOR; + data->sensor[0].irq_name = "tsensor_a73"; + data->sensor[0].data = data; - data->sensor.id = HI3660_DEFAULT_SENSOR; + data->sensor[1].id = HI3660_LITTLE_SENSOR; + data->sensor[1].irq_name = "tsensor_a53"; + data->sensor[1].data = data; return 0; } static int hisi_thermal_get_temp(void *__data, int *temp) { - struct hisi_thermal_data *data = __data; - struct hisi_thermal_sensor *sensor = &data->sensor; + struct hisi_thermal_sensor *sensor = __data; + struct hisi_thermal_data *data = sensor->data; - *temp = data->get_temp(data); + *temp = data->ops->get_temp(sensor); - dev_dbg(&data->pdev->dev, "id=%d, temp=%d, thres=%d\n", - sensor->id, *temp, sensor->thres_temp); + dev_dbg(&data->pdev->dev, "tzd=%p, id=%d, temp=%d, thres=%d\n", + sensor->tzd, sensor->id, *temp, sensor->thres_temp); return 0; } @@ -449,38 +461,39 @@ static const struct thermal_zone_of_device_ops hisi_of_thermal_ops = { static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev) { - struct hisi_thermal_data *data = dev; - struct hisi_thermal_sensor *sensor = &data->sensor; + struct hisi_thermal_sensor *sensor = dev; + struct hisi_thermal_data *data = sensor->data; int temp = 0; - data->irq_handler(data); + data->ops->irq_handler(sensor); - hisi_thermal_get_temp(data, &temp); + hisi_thermal_get_temp(sensor, &temp); if (temp >= sensor->thres_temp) { - dev_crit(&data->pdev->dev, "THERMAL ALARM: %d > %d\n", - temp, sensor->thres_temp); + dev_crit(&data->pdev->dev, + "sensor <%d> THERMAL ALARM: %d > %d\n", + sensor->id, temp, sensor->thres_temp); - thermal_zone_device_update(data->sensor.tzd, + thermal_zone_device_update(sensor->tzd, THERMAL_EVENT_UNSPECIFIED); } else { - dev_crit(&data->pdev->dev, "THERMAL ALARM stopped: %d < %d\n", - temp, sensor->thres_temp); + dev_crit(&data->pdev->dev, + "sensor <%d> THERMAL ALARM stopped: %d < %d\n", + sensor->id, temp, sensor->thres_temp); } return IRQ_HANDLED; } static int hisi_thermal_register_sensor(struct platform_device *pdev, - struct hisi_thermal_data *data, struct hisi_thermal_sensor *sensor) { int ret, i; const struct thermal_trip *trip; sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, - sensor->id, data, + sensor->id, sensor, &hisi_of_thermal_ops); if (IS_ERR(sensor->tzd)) { ret = PTR_ERR(sensor->tzd); @@ -502,14 +515,30 @@ static int hisi_thermal_register_sensor(struct platform_device *pdev, return 0; } +static const struct hisi_thermal_ops hi6220_ops = { + .get_temp = hi6220_thermal_get_temp, + .enable_sensor = hi6220_thermal_enable_sensor, + .disable_sensor = hi6220_thermal_disable_sensor, + .irq_handler = hi6220_thermal_irq_handler, + .probe = hi6220_thermal_probe, +}; + +static const struct hisi_thermal_ops hi3660_ops = { + .get_temp = hi3660_thermal_get_temp, + .enable_sensor = hi3660_thermal_enable_sensor, + .disable_sensor = hi3660_thermal_disable_sensor, + .irq_handler = hi3660_thermal_irq_handler, + .probe = hi3660_thermal_probe, +}; + static const struct of_device_id of_hisi_thermal_match[] = { { .compatible = "hisilicon,tsensor", - .data = hi6220_thermal_probe + .data = &hi6220_ops, }, { .compatible = "hisilicon,hi3660-tsensor", - .data = hi3660_thermal_probe + .data = &hi3660_ops, }, { /* end */ } }; @@ -527,9 +556,9 @@ static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor, static int hisi_thermal_probe(struct platform_device *pdev) { struct hisi_thermal_data *data; - int (*platform_probe)(struct hisi_thermal_data *); struct device *dev = &pdev->dev; - int ret; + struct resource *res; + int i, ret; data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) @@ -537,41 +566,50 @@ static int hisi_thermal_probe(struct platform_device *pdev) data->pdev = pdev; platform_set_drvdata(pdev, data); + data->ops = of_device_get_match_data(dev); - platform_probe = of_device_get_match_data(dev); - if (!platform_probe) { - dev_err(dev, "failed to get probe func\n"); - return -EINVAL; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(data->regs)) { + dev_err(dev, "failed to get io address\n"); + return PTR_ERR(data->regs); } - ret = platform_probe(data); + ret = data->ops->probe(data); if (ret) return ret; - ret = hisi_thermal_register_sensor(pdev, data, - &data->sensor); - if (ret) { - dev_err(dev, "failed to register thermal sensor: %d\n", ret); - return ret; - } + for (i = 0; i < data->nr_sensors; i++) { + struct hisi_thermal_sensor *sensor = &data->sensor[i]; - ret = data->enable_sensor(data); - if (ret) { - dev_err(dev, "Failed to setup the sensor: %d\n", ret); - return ret; - } + ret = hisi_thermal_register_sensor(pdev, sensor); + if (ret) { + dev_err(dev, "failed to register thermal sensor: %d\n", + ret); + return ret; + } + + ret = platform_get_irq_byname(pdev, sensor->irq_name); + if (ret < 0) + return ret; - if (data->irq) { - ret = devm_request_threaded_irq(dev, data->irq, NULL, - hisi_thermal_alarm_irq_thread, - IRQF_ONESHOT, "hisi_thermal", data); + ret = devm_request_threaded_irq(dev, ret, NULL, + hisi_thermal_alarm_irq_thread, + IRQF_ONESHOT, sensor->irq_name, + sensor); if (ret < 0) { - dev_err(dev, "failed to request alarm irq: %d\n", ret); + dev_err(dev, "Failed to request alarm irq: %d\n", ret); return ret; } - } - hisi_thermal_toggle_sensor(&data->sensor, true); + ret = data->ops->enable_sensor(sensor); + if (ret) { + dev_err(dev, "Failed to setup the sensor: %d\n", ret); + return ret; + } + + hisi_thermal_toggle_sensor(sensor, true); + } return 0; } @@ -579,11 +617,14 @@ static int hisi_thermal_probe(struct platform_device *pdev) static int hisi_thermal_remove(struct platform_device *pdev) { struct hisi_thermal_data *data = platform_get_drvdata(pdev); - struct hisi_thermal_sensor *sensor = &data->sensor; + int i; - hisi_thermal_toggle_sensor(sensor, false); + for (i = 0; i < data->nr_sensors; i++) { + struct hisi_thermal_sensor *sensor = &data->sensor[i]; - data->disable_sensor(data); + hisi_thermal_toggle_sensor(sensor, false); + data->ops->disable_sensor(sensor); + } return 0; } @@ -592,8 +633,10 @@ static int hisi_thermal_remove(struct platform_device *pdev) static int hisi_thermal_suspend(struct device *dev) { struct hisi_thermal_data *data = dev_get_drvdata(dev); + int i; - data->disable_sensor(data); + for (i = 0; i < data->nr_sensors; i++) + data->ops->disable_sensor(&data->sensor[i]); return 0; } @@ -601,8 +644,12 @@ static int hisi_thermal_suspend(struct device *dev) static int hisi_thermal_resume(struct device *dev) { struct hisi_thermal_data *data = dev_get_drvdata(dev); + int i, ret = 0; + + for (i = 0; i < data->nr_sensors; i++) + ret |= data->ops->enable_sensor(&data->sensor[i]); - return data->enable_sensor(data); + return ret; } #endif diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c index aa452acb60b6..15661549eb67 100644 --- a/drivers/thermal/imx_thermal.c +++ b/drivers/thermal/imx_thermal.c @@ -725,7 +725,7 @@ static int imx_thermal_probe(struct platform_device *pdev) } else { ret = imx_init_from_tempmon_data(pdev); if (ret) { - dev_err(&pdev->dev, "failed to init from from fsl,tempmon-data\n"); + dev_err(&pdev->dev, "failed to init from fsl,tempmon-data\n"); return ret; } } @@ -762,9 +762,7 @@ static int imx_thermal_probe(struct platform_device *pdev) if (ret != -EPROBE_DEFER) dev_err(&pdev->dev, "failed to get thermal clk: %d\n", ret); - cpufreq_cooling_unregister(data->cdev); - cpufreq_cpu_put(data->policy); - return ret; + goto cpufreq_put; } /* @@ -777,9 +775,7 @@ static int imx_thermal_probe(struct platform_device *pdev) ret = clk_prepare_enable(data->thermal_clk); if (ret) { dev_err(&pdev->dev, "failed to enable thermal clk: %d\n", ret); - cpufreq_cooling_unregister(data->cdev); - cpufreq_cpu_put(data->policy); - return ret; + goto cpufreq_put; } data->tz = thermal_zone_device_register("imx_thermal_zone", @@ -792,10 +788,7 @@ static int imx_thermal_probe(struct platform_device *pdev) ret = PTR_ERR(data->tz); dev_err(&pdev->dev, "failed to register thermal zone device %d\n", ret); - clk_disable_unprepare(data->thermal_clk); - cpufreq_cooling_unregister(data->cdev); - cpufreq_cpu_put(data->policy); - return ret; + goto clk_disable; } dev_info(&pdev->dev, "%s CPU temperature grade - max:%dC" @@ -827,14 +820,20 @@ static int imx_thermal_probe(struct platform_device *pdev) 0, "imx_thermal", data); if (ret < 0) { dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret); - clk_disable_unprepare(data->thermal_clk); - thermal_zone_device_unregister(data->tz); - cpufreq_cooling_unregister(data->cdev); - cpufreq_cpu_put(data->policy); - return ret; + goto thermal_zone_unregister; } return 0; + +thermal_zone_unregister: + thermal_zone_device_unregister(data->tz); +clk_disable: + clk_disable_unprepare(data->thermal_clk); +cpufreq_put: + cpufreq_cooling_unregister(data->cdev); + cpufreq_cpu_put(data->policy); + + return ret; } static int imx_thermal_remove(struct platform_device *pdev) diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c index 4f2816559205..4bfdb4a1e47d 100644 --- a/drivers/thermal/of-thermal.c +++ b/drivers/thermal/of-thermal.c @@ -19,23 +19,34 @@ /*** Private data structures to represent thermal device tree data ***/ /** - * struct __thermal_bind_param - a match between trip and cooling device + * struct __thermal_cooling_bind_param - a cooling device for a trip point * @cooling_device: a pointer to identify the referred cooling device - * @trip_id: the trip point index - * @usage: the percentage (from 0 to 100) of cooling contribution * @min: minimum cooling state used at this trip point * @max: maximum cooling state used at this trip point */ -struct __thermal_bind_params { +struct __thermal_cooling_bind_param { struct device_node *cooling_device; - unsigned int trip_id; - unsigned int usage; unsigned long min; unsigned long max; }; /** + * struct __thermal_bind_param - a match between trip and cooling device + * @tcbp: a pointer to an array of cooling devices + * @count: number of elements in array + * @trip_id: the trip point index + * @usage: the percentage (from 0 to 100) of cooling contribution + */ + +struct __thermal_bind_params { + struct __thermal_cooling_bind_param *tcbp; + unsigned int count; + unsigned int trip_id; + unsigned int usage; +}; + +/** * struct __thermal_zone - internal representation of a thermal zone * @mode: current thermal zone device mode (enabled/disabled) * @passive_delay: polling interval while passive cooling is activated @@ -192,25 +203,31 @@ static int of_thermal_bind(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) { struct __thermal_zone *data = thermal->devdata; - int i; + struct __thermal_bind_params *tbp; + struct __thermal_cooling_bind_param *tcbp; + int i, j; if (!data || IS_ERR(data)) return -ENODEV; /* find where to bind */ for (i = 0; i < data->num_tbps; i++) { - struct __thermal_bind_params *tbp = data->tbps + i; + tbp = data->tbps + i; - if (tbp->cooling_device == cdev->np) { - int ret; + for (j = 0; j < tbp->count; j++) { + tcbp = tbp->tcbp + j; - ret = thermal_zone_bind_cooling_device(thermal, + if (tcbp->cooling_device == cdev->np) { + int ret; + + ret = thermal_zone_bind_cooling_device(thermal, tbp->trip_id, cdev, - tbp->max, - tbp->min, + tcbp->max, + tcbp->min, tbp->usage); - if (ret) - return ret; + if (ret) + return ret; + } } } @@ -221,22 +238,28 @@ static int of_thermal_unbind(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) { struct __thermal_zone *data = thermal->devdata; - int i; + struct __thermal_bind_params *tbp; + struct __thermal_cooling_bind_param *tcbp; + int i, j; if (!data || IS_ERR(data)) return -ENODEV; /* find where to unbind */ for (i = 0; i < data->num_tbps; i++) { - struct __thermal_bind_params *tbp = data->tbps + i; + tbp = data->tbps + i; + + for (j = 0; j < tbp->count; j++) { + tcbp = tbp->tcbp + j; - if (tbp->cooling_device == cdev->np) { - int ret; + if (tcbp->cooling_device == cdev->np) { + int ret; - ret = thermal_zone_unbind_cooling_device(thermal, - tbp->trip_id, cdev); - if (ret) - return ret; + ret = thermal_zone_unbind_cooling_device(thermal, + tbp->trip_id, cdev); + if (ret) + return ret; + } } } @@ -486,8 +509,8 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data, if (sensor_specs.args_count >= 1) { id = sensor_specs.args[0]; WARN(sensor_specs.args_count > 1, - "%s: too many cells in sensor specifier %d\n", - sensor_specs.np->name, sensor_specs.args_count); + "%pOFn: too many cells in sensor specifier %d\n", + sensor_specs.np, sensor_specs.args_count); } else { id = 0; } @@ -655,8 +678,9 @@ static int thermal_of_populate_bind_params(struct device_node *np, int ntrips) { struct of_phandle_args cooling_spec; + struct __thermal_cooling_bind_param *__tcbp; struct device_node *trip; - int ret, i; + int ret, i, count; u32 prop; /* Default weight. Usage is optional */ @@ -683,20 +707,44 @@ static int thermal_of_populate_bind_params(struct device_node *np, goto end; } - ret = of_parse_phandle_with_args(np, "cooling-device", "#cooling-cells", - 0, &cooling_spec); - if (ret < 0) { - pr_err("missing cooling_device property\n"); + count = of_count_phandle_with_args(np, "cooling-device", + "#cooling-cells"); + if (!count) { + pr_err("Add a cooling_device property with at least one device\n"); goto end; } - __tbp->cooling_device = cooling_spec.np; - if (cooling_spec.args_count >= 2) { /* at least min and max */ - __tbp->min = cooling_spec.args[0]; - __tbp->max = cooling_spec.args[1]; - } else { - pr_err("wrong reference to cooling device, missing limits\n"); + + __tcbp = kcalloc(count, sizeof(*__tcbp), GFP_KERNEL); + if (!__tcbp) + goto end; + + for (i = 0; i < count; i++) { + ret = of_parse_phandle_with_args(np, "cooling-device", + "#cooling-cells", i, &cooling_spec); + if (ret < 0) { + pr_err("Invalid cooling-device entry\n"); + goto free_tcbp; + } + + __tcbp[i].cooling_device = cooling_spec.np; + + if (cooling_spec.args_count >= 2) { /* at least min and max */ + __tcbp[i].min = cooling_spec.args[0]; + __tcbp[i].max = cooling_spec.args[1]; + } else { + pr_err("wrong reference to cooling device, missing limits\n"); + } } + __tbp->tcbp = __tcbp; + __tbp->count = count; + + goto end; + +free_tcbp: + for (i = i - 1; i >= 0; i--) + of_node_put(__tcbp[i].cooling_device); + kfree(__tcbp); end: of_node_put(trip); @@ -903,8 +951,16 @@ finish: return tz; free_tbps: - for (i = i - 1; i >= 0; i--) - of_node_put(tz->tbps[i].cooling_device); + for (i = i - 1; i >= 0; i--) { + struct __thermal_bind_params *tbp = tz->tbps + i; + int j; + + for (j = 0; j < tbp->count; j++) + of_node_put(tbp->tcbp[j].cooling_device); + + kfree(tbp->tcbp); + } + kfree(tz->tbps); free_trips: for (i = 0; i < tz->ntrips; i++) @@ -920,10 +976,18 @@ free_tz: static inline void of_thermal_free_zone(struct __thermal_zone *tz) { - int i; + struct __thermal_bind_params *tbp; + int i, j; + + for (i = 0; i < tz->num_tbps; i++) { + tbp = tz->tbps + i; + + for (j = 0; j < tbp->count; j++) + of_node_put(tbp->tcbp[j].cooling_device); + + kfree(tbp->tcbp); + } - for (i = 0; i < tz->num_tbps; i++) - of_node_put(tz->tbps[i].cooling_device); kfree(tz->tbps); for (i = 0; i < tz->ntrips; i++) of_node_put(tz->trips[i].np); @@ -963,8 +1027,8 @@ int __init of_parse_thermal_zones(void) tz = thermal_of_build_thermal_zone(child); if (IS_ERR(tz)) { - pr_err("failed to build thermal zone %s: %ld\n", - child->name, + pr_err("failed to build thermal zone %pOFn: %ld\n", + child, PTR_ERR(tz)); continue; } @@ -998,7 +1062,7 @@ int __init of_parse_thermal_zones(void) tz->passive_delay, tz->polling_delay); if (IS_ERR(zone)) { - pr_err("Failed to build %s zone %ld\n", child->name, + pr_err("Failed to build %pOFn zone %ld\n", child, PTR_ERR(zone)); kfree(tzp); kfree(ops); diff --git a/drivers/thermal/qcom-spmi-temp-alarm.c b/drivers/thermal/qcom-spmi-temp-alarm.c index ad4f3a8d6560..b2d5d5bf4a9b 100644 --- a/drivers/thermal/qcom-spmi-temp-alarm.c +++ b/drivers/thermal/qcom-spmi-temp-alarm.c @@ -23,6 +23,8 @@ #include <linux/regmap.h> #include <linux/thermal.h> +#include "thermal_core.h" + #define QPNP_TM_REG_TYPE 0x04 #define QPNP_TM_REG_SUBTYPE 0x05 #define QPNP_TM_REG_STATUS 0x08 @@ -37,9 +39,11 @@ #define STATUS_GEN2_STATE_MASK GENMASK(6, 4) #define STATUS_GEN2_STATE_SHIFT 4 -#define SHUTDOWN_CTRL1_OVERRIDE_MASK GENMASK(7, 6) +#define SHUTDOWN_CTRL1_OVERRIDE_S2 BIT(6) #define SHUTDOWN_CTRL1_THRESHOLD_MASK GENMASK(1, 0) +#define SHUTDOWN_CTRL1_RATE_25HZ BIT(3) + #define ALARM_CTRL_FORCE_ENABLE BIT(7) /* @@ -56,12 +60,19 @@ #define TEMP_THRESH_STEP 5000 /* Threshold step: 5 C */ #define THRESH_MIN 0 +#define THRESH_MAX 3 + +/* Stage 2 Threshold Min: 125 C */ +#define STAGE2_THRESHOLD_MIN 125000 +/* Stage 2 Threshold Max: 140 C */ +#define STAGE2_THRESHOLD_MAX 140000 /* Temperature in Milli Celsius reported during stage 0 if no ADC is present */ #define DEFAULT_TEMP 37000 struct qpnp_tm_chip { struct regmap *map; + struct device *dev; struct thermal_zone_device *tz_dev; unsigned int subtype; long temp; @@ -69,6 +80,10 @@ struct qpnp_tm_chip { unsigned int stage; unsigned int prev_stage; unsigned int base; + /* protects .thresh, .stage and chip registers */ + struct mutex lock; + bool initialized; + struct iio_channel *adc; }; @@ -125,6 +140,8 @@ static int qpnp_tm_update_temp_no_adc(struct qpnp_tm_chip *chip) unsigned int stage, stage_new, stage_old; int ret; + WARN_ON(!mutex_is_locked(&chip->lock)); + ret = qpnp_tm_get_temp_stage(chip); if (ret < 0) return ret; @@ -163,8 +180,15 @@ static int qpnp_tm_get_temp(void *data, int *temp) if (!temp) return -EINVAL; + if (!chip->initialized) { + *temp = DEFAULT_TEMP; + return 0; + } + if (!chip->adc) { + mutex_lock(&chip->lock); ret = qpnp_tm_update_temp_no_adc(chip); + mutex_unlock(&chip->lock); if (ret < 0) return ret; } else { @@ -180,8 +204,72 @@ static int qpnp_tm_get_temp(void *data, int *temp) return 0; } +static int qpnp_tm_update_critical_trip_temp(struct qpnp_tm_chip *chip, + int temp) +{ + u8 reg; + bool disable_s2_shutdown = false; + + WARN_ON(!mutex_is_locked(&chip->lock)); + + /* + * Default: S2 and S3 shutdown enabled, thresholds at + * 105C/125C/145C, monitoring at 25Hz + */ + reg = SHUTDOWN_CTRL1_RATE_25HZ; + + if (temp == THERMAL_TEMP_INVALID || + temp < STAGE2_THRESHOLD_MIN) { + chip->thresh = THRESH_MIN; + goto skip; + } + + if (temp <= STAGE2_THRESHOLD_MAX) { + chip->thresh = THRESH_MAX - + ((STAGE2_THRESHOLD_MAX - temp) / + TEMP_THRESH_STEP); + disable_s2_shutdown = true; + } else { + chip->thresh = THRESH_MAX; + + if (chip->adc) + disable_s2_shutdown = true; + else + dev_warn(chip->dev, + "No ADC is configured and critical temperature is above the maximum stage 2 threshold of 140 C! Configuring stage 2 shutdown at 140 C.\n"); + } + +skip: + reg |= chip->thresh; + if (disable_s2_shutdown) + reg |= SHUTDOWN_CTRL1_OVERRIDE_S2; + + return qpnp_tm_write(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, reg); +} + +static int qpnp_tm_set_trip_temp(void *data, int trip, int temp) +{ + struct qpnp_tm_chip *chip = data; + const struct thermal_trip *trip_points; + int ret; + + trip_points = of_thermal_get_trip_points(chip->tz_dev); + if (!trip_points) + return -EINVAL; + + if (trip_points[trip].type != THERMAL_TRIP_CRITICAL) + return 0; + + mutex_lock(&chip->lock); + ret = qpnp_tm_update_critical_trip_temp(chip, temp); + mutex_unlock(&chip->lock); + + return ret; +} + static const struct thermal_zone_of_device_ops qpnp_tm_sensor_ops = { .get_temp = qpnp_tm_get_temp, + .set_trip_temp = qpnp_tm_set_trip_temp, }; static irqreturn_t qpnp_tm_isr(int irq, void *data) @@ -193,6 +281,29 @@ static irqreturn_t qpnp_tm_isr(int irq, void *data) return IRQ_HANDLED; } +static int qpnp_tm_get_critical_trip_temp(struct qpnp_tm_chip *chip) +{ + int ntrips; + const struct thermal_trip *trips; + int i; + + ntrips = of_thermal_get_ntrips(chip->tz_dev); + if (ntrips <= 0) + return THERMAL_TEMP_INVALID; + + trips = of_thermal_get_trip_points(chip->tz_dev); + if (!trips) + return THERMAL_TEMP_INVALID; + + for (i = 0; i < ntrips; i++) { + if (of_thermal_is_trip_valid(chip->tz_dev, i) && + trips[i].type == THERMAL_TRIP_CRITICAL) + return trips[i].temperature; + } + + return THERMAL_TEMP_INVALID; +} + /* * This function initializes the internal temp value based on only the * current thermal stage and threshold. Setup threshold control and @@ -203,17 +314,20 @@ static int qpnp_tm_init(struct qpnp_tm_chip *chip) unsigned int stage; int ret; u8 reg = 0; + int crit_temp; + + mutex_lock(&chip->lock); ret = qpnp_tm_read(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, ®); if (ret < 0) - return ret; + goto out; chip->thresh = reg & SHUTDOWN_CTRL1_THRESHOLD_MASK; chip->temp = DEFAULT_TEMP; ret = qpnp_tm_get_temp_stage(chip); if (ret < 0) - return ret; + goto out; chip->stage = ret; stage = chip->subtype == QPNP_TM_SUBTYPE_GEN1 @@ -224,21 +338,19 @@ static int qpnp_tm_init(struct qpnp_tm_chip *chip) (stage - 1) * TEMP_STAGE_STEP + TEMP_THRESH_MIN; - /* - * Set threshold and disable software override of stage 2 and 3 - * shutdowns. - */ - chip->thresh = THRESH_MIN; - reg &= ~(SHUTDOWN_CTRL1_OVERRIDE_MASK | SHUTDOWN_CTRL1_THRESHOLD_MASK); - reg |= chip->thresh & SHUTDOWN_CTRL1_THRESHOLD_MASK; - ret = qpnp_tm_write(chip, QPNP_TM_REG_SHUTDOWN_CTRL1, reg); + crit_temp = qpnp_tm_get_critical_trip_temp(chip); + ret = qpnp_tm_update_critical_trip_temp(chip, crit_temp); if (ret < 0) - return ret; + goto out; /* Enable the thermal alarm PMIC module in always-on mode. */ reg = ALARM_CTRL_FORCE_ENABLE; ret = qpnp_tm_write(chip, QPNP_TM_REG_ALARM_CTRL, reg); + chip->initialized = true; + +out: + mutex_unlock(&chip->lock); return ret; } @@ -257,6 +369,9 @@ static int qpnp_tm_probe(struct platform_device *pdev) return -ENOMEM; dev_set_drvdata(&pdev->dev, chip); + chip->dev = &pdev->dev; + + mutex_init(&chip->lock); chip->map = dev_get_regmap(pdev->dev.parent, NULL); if (!chip->map) @@ -302,6 +417,18 @@ static int qpnp_tm_probe(struct platform_device *pdev) chip->subtype = subtype; + /* + * Register the sensor before initializing the hardware to be able to + * read the trip points. get_temp() returns the default temperature + * before the hardware initialization is completed. + */ + chip->tz_dev = devm_thermal_zone_of_sensor_register( + &pdev->dev, 0, chip, &qpnp_tm_sensor_ops); + if (IS_ERR(chip->tz_dev)) { + dev_err(&pdev->dev, "failed to register sensor\n"); + return PTR_ERR(chip->tz_dev); + } + ret = qpnp_tm_init(chip); if (ret < 0) { dev_err(&pdev->dev, "init failed\n"); @@ -313,12 +440,7 @@ static int qpnp_tm_probe(struct platform_device *pdev) if (ret < 0) return ret; - chip->tz_dev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, chip, - &qpnp_tm_sensor_ops); - if (IS_ERR(chip->tz_dev)) { - dev_err(&pdev->dev, "failed to register sensor\n"); - return PTR_ERR(chip->tz_dev); - } + thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED); return 0; } diff --git a/drivers/thermal/qcom/tsens-8916.c b/drivers/thermal/qcom/tsens-8916.c index fdf561b8b81d..c6dd620ac029 100644 --- a/drivers/thermal/qcom/tsens-8916.c +++ b/drivers/thermal/qcom/tsens-8916.c @@ -1,15 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/platform_device.h> @@ -109,5 +100,6 @@ static const struct tsens_ops ops_8916 = { const struct tsens_data data_8916 = { .num_sensors = 5, .ops = &ops_8916, + .reg_offsets = { [SROT_CTRL_OFFSET] = 0x0 }, .hw_ids = (unsigned int []){0, 1, 2, 4, 5 }, }; diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c index 0451277d3a8f..0f0adb302a7b 100644 --- a/drivers/thermal/qcom/tsens-8960.c +++ b/drivers/thermal/qcom/tsens-8960.c @@ -1,15 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/platform_device.h> @@ -69,7 +60,7 @@ static int suspend_8960(struct tsens_device *tmdev) { int ret; unsigned int mask; - struct regmap *map = tmdev->map; + struct regmap *map = tmdev->tm_map; ret = regmap_read(map, THRESHOLD_ADDR, &tmdev->ctx.threshold); if (ret) @@ -94,7 +85,7 @@ static int suspend_8960(struct tsens_device *tmdev) static int resume_8960(struct tsens_device *tmdev) { int ret; - struct regmap *map = tmdev->map; + struct regmap *map = tmdev->tm_map; ret = regmap_update_bits(map, CNTL_ADDR, SW_RST, SW_RST); if (ret) @@ -126,12 +117,12 @@ static int enable_8960(struct tsens_device *tmdev, int id) int ret; u32 reg, mask; - ret = regmap_read(tmdev->map, CNTL_ADDR, ®); + ret = regmap_read(tmdev->tm_map, CNTL_ADDR, ®); if (ret) return ret; mask = BIT(id + SENSOR0_SHIFT); - ret = regmap_write(tmdev->map, CNTL_ADDR, reg | SW_RST); + ret = regmap_write(tmdev->tm_map, CNTL_ADDR, reg | SW_RST); if (ret) return ret; @@ -140,7 +131,7 @@ static int enable_8960(struct tsens_device *tmdev, int id) else reg |= mask | SLP_CLK_ENA_8660 | EN; - ret = regmap_write(tmdev->map, CNTL_ADDR, reg); + ret = regmap_write(tmdev->tm_map, CNTL_ADDR, reg); if (ret) return ret; @@ -157,7 +148,7 @@ static void disable_8960(struct tsens_device *tmdev) mask <<= SENSOR0_SHIFT; mask |= EN; - ret = regmap_read(tmdev->map, CNTL_ADDR, ®_cntl); + ret = regmap_read(tmdev->tm_map, CNTL_ADDR, ®_cntl); if (ret) return; @@ -168,7 +159,7 @@ static void disable_8960(struct tsens_device *tmdev) else reg_cntl &= ~SLP_CLK_ENA_8660; - regmap_write(tmdev->map, CNTL_ADDR, reg_cntl); + regmap_write(tmdev->tm_map, CNTL_ADDR, reg_cntl); } static int init_8960(struct tsens_device *tmdev) @@ -176,8 +167,8 @@ static int init_8960(struct tsens_device *tmdev) int ret, i; u32 reg_cntl; - tmdev->map = dev_get_regmap(tmdev->dev, NULL); - if (!tmdev->map) + tmdev->tm_map = dev_get_regmap(tmdev->dev, NULL); + if (!tmdev->tm_map) return -ENODEV; /* @@ -193,14 +184,14 @@ static int init_8960(struct tsens_device *tmdev) } reg_cntl = SW_RST; - ret = regmap_update_bits(tmdev->map, CNTL_ADDR, SW_RST, reg_cntl); + ret = regmap_update_bits(tmdev->tm_map, CNTL_ADDR, SW_RST, reg_cntl); if (ret) return ret; if (tmdev->num_sensors > 1) { reg_cntl |= SLP_CLK_ENA | (MEASURE_PERIOD << 18); reg_cntl &= ~SW_RST; - ret = regmap_update_bits(tmdev->map, CONFIG_ADDR, + ret = regmap_update_bits(tmdev->tm_map, CONFIG_ADDR, CONFIG_MASK, CONFIG); } else { reg_cntl |= SLP_CLK_ENA_8660 | (MEASURE_PERIOD << 16); @@ -209,12 +200,12 @@ static int init_8960(struct tsens_device *tmdev) } reg_cntl |= GENMASK(tmdev->num_sensors - 1, 0) << SENSOR0_SHIFT; - ret = regmap_write(tmdev->map, CNTL_ADDR, reg_cntl); + ret = regmap_write(tmdev->tm_map, CNTL_ADDR, reg_cntl); if (ret) return ret; reg_cntl |= EN; - ret = regmap_write(tmdev->map, CNTL_ADDR, reg_cntl); + ret = regmap_write(tmdev->tm_map, CNTL_ADDR, reg_cntl); if (ret) return ret; @@ -261,12 +252,12 @@ static int get_temp_8960(struct tsens_device *tmdev, int id, int *temp) timeout = jiffies + usecs_to_jiffies(TIMEOUT_US); do { - ret = regmap_read(tmdev->map, INT_STATUS_ADDR, &trdy); + ret = regmap_read(tmdev->tm_map, INT_STATUS_ADDR, &trdy); if (ret) return ret; if (!(trdy & TRDY_MASK)) continue; - ret = regmap_read(tmdev->map, s->status, &code); + ret = regmap_read(tmdev->tm_map, s->status, &code); if (ret) return ret; *temp = code_to_mdegC(code, s); diff --git a/drivers/thermal/qcom/tsens-8974.c b/drivers/thermal/qcom/tsens-8974.c index 9baf77e8cbe3..3d3fda3d731b 100644 --- a/drivers/thermal/qcom/tsens-8974.c +++ b/drivers/thermal/qcom/tsens-8974.c @@ -1,15 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/platform_device.h> @@ -241,4 +232,5 @@ static const struct tsens_ops ops_8974 = { const struct tsens_data data_8974 = { .num_sensors = 11, .ops = &ops_8974, + .reg_offsets = { [SROT_CTRL_OFFSET] = 0x0 }, }; diff --git a/drivers/thermal/qcom/tsens-common.c b/drivers/thermal/qcom/tsens-common.c index 6207d8d92351..3be4be2e0465 100644 --- a/drivers/thermal/qcom/tsens-common.c +++ b/drivers/thermal/qcom/tsens-common.c @@ -1,15 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/err.h> @@ -21,7 +12,11 @@ #include <linux/regmap.h> #include "tsens.h" -#define S0_ST_ADDR 0x1030 +/* SROT */ +#define TSENS_EN BIT(0) + +/* TM */ +#define STATUS_OFFSET 0x30 #define SN_ADDR_OFFSET 0x4 #define SN_ST_TEMP_MASK 0x3ff #define CAL_DEGC_PT1 30 @@ -107,8 +102,8 @@ int get_temp_common(struct tsens_device *tmdev, int id, int *temp) unsigned int status_reg; int last_temp = 0, ret; - status_reg = S0_ST_ADDR + s->hw_id * SN_ADDR_OFFSET; - ret = regmap_read(tmdev->map, status_reg, &code); + status_reg = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * SN_ADDR_OFFSET; + ret = regmap_read(tmdev->tm_map, status_reg, &code); if (ret) return ret; last_temp = code & SN_ST_TEMP_MASK; @@ -126,29 +121,52 @@ static const struct regmap_config tsens_config = { int __init init_common(struct tsens_device *tmdev) { - void __iomem *base; + void __iomem *tm_base, *srot_base; struct resource *res; + u32 code; + int ret; struct platform_device *op = of_find_device_by_node(tmdev->dev->of_node); + u16 ctrl_offset = tmdev->reg_offsets[SROT_CTRL_OFFSET]; if (!op) return -EINVAL; - /* The driver only uses the TM register address space for now */ if (op->num_resources > 1) { + /* DT with separate SROT and TM address space */ tmdev->tm_offset = 0; + res = platform_get_resource(op, IORESOURCE_MEM, 1); + srot_base = devm_ioremap_resource(&op->dev, res); + if (IS_ERR(srot_base)) + return PTR_ERR(srot_base); + + tmdev->srot_map = devm_regmap_init_mmio(tmdev->dev, + srot_base, &tsens_config); + if (IS_ERR(tmdev->srot_map)) + return PTR_ERR(tmdev->srot_map); + } else { /* old DTs where SROT and TM were in a contiguous 2K block */ tmdev->tm_offset = 0x1000; } res = platform_get_resource(op, IORESOURCE_MEM, 0); - base = devm_ioremap_resource(&op->dev, res); - if (IS_ERR(base)) - return PTR_ERR(base); - - tmdev->map = devm_regmap_init_mmio(tmdev->dev, base, &tsens_config); - if (IS_ERR(tmdev->map)) - return PTR_ERR(tmdev->map); + tm_base = devm_ioremap_resource(&op->dev, res); + if (IS_ERR(tm_base)) + return PTR_ERR(tm_base); + + tmdev->tm_map = devm_regmap_init_mmio(tmdev->dev, tm_base, &tsens_config); + if (IS_ERR(tmdev->tm_map)) + return PTR_ERR(tmdev->tm_map); + + if (tmdev->srot_map) { + ret = regmap_read(tmdev->srot_map, ctrl_offset, &code); + if (ret) + return ret; + if (!(code & TSENS_EN)) { + dev_err(tmdev->dev, "tsens device is not enabled\n"); + return -ENODEV; + } + } return 0; } diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c index 44da02f594ac..381a212872bf 100644 --- a/drivers/thermal/qcom/tsens-v2.c +++ b/drivers/thermal/qcom/tsens-v2.c @@ -21,7 +21,7 @@ static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp) int ret; status_reg = tmdev->tm_offset + STATUS_OFFSET + s->hw_id * 4; - ret = regmap_read(tmdev->map, status_reg, &code); + ret = regmap_read(tmdev->tm_map, status_reg, &code); if (ret) return ret; last_temp = code & LAST_TEMP_MASK; @@ -29,7 +29,7 @@ static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp) goto done; /* Try a second time */ - ret = regmap_read(tmdev->map, status_reg, &code); + ret = regmap_read(tmdev->tm_map, status_reg, &code); if (ret) return ret; if (code & STATUS_VALID_BIT) { @@ -40,7 +40,7 @@ static int get_temp_tsens_v2(struct tsens_device *tmdev, int id, int *temp) } /* Try a third/last time */ - ret = regmap_read(tmdev->map, status_reg, &code); + ret = regmap_read(tmdev->tm_map, status_reg, &code); if (ret) return ret; if (code & STATUS_VALID_BIT) { @@ -68,10 +68,12 @@ static const struct tsens_ops ops_generic_v2 = { const struct tsens_data data_tsens_v2 = { .ops = &ops_generic_v2, + .reg_offsets = { [SROT_CTRL_OFFSET] = 0x4 }, }; /* Kept around for backward compatibility with old msm8996.dtsi */ const struct tsens_data data_8996 = { .num_sensors = 13, .ops = &ops_generic_v2, + .reg_offsets = { [SROT_CTRL_OFFSET] = 0x4 }, }; diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index a2c9bfae3d86..f1ec9bbe4717 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -1,15 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * */ #include <linux/err.h> @@ -89,11 +80,6 @@ static int tsens_register(struct tsens_device *tmdev) { int i; struct thermal_zone_device *tzd; - u32 *hw_id, n = tmdev->num_sensors; - - hw_id = devm_kcalloc(tmdev->dev, n, sizeof(u32), GFP_KERNEL); - if (!hw_id) - return -ENOMEM; for (i = 0; i < tmdev->num_sensors; i++) { tmdev->sensor[i].tmdev = tmdev; @@ -158,6 +144,9 @@ static int tsens_probe(struct platform_device *pdev) else tmdev->sensor[i].hw_id = i; } + for (i = 0; i < REG_ARRAY_SIZE; i++) { + tmdev->reg_offsets[i] = data->reg_offsets[i]; + } if (!tmdev->ops || !tmdev->ops->init || !tmdev->ops->get_temp) return -EINVAL; diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 14331eb45a86..7b7feee5dc46 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -1,15 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (c) 2015, The Linux Foundation. All rights reserved. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ + #ifndef __QCOM_TSENS_H__ #define __QCOM_TSENS_H__ @@ -55,15 +48,23 @@ struct tsens_ops { int (*get_trend)(struct tsens_device *, int, enum thermal_trend *); }; +enum reg_list { + SROT_CTRL_OFFSET, + + REG_ARRAY_SIZE, +}; + /** * struct tsens_data - tsens instance specific data * @num_sensors: Max number of sensors supported by platform * @ops: operations the tsens instance supports * @hw_ids: Subset of sensors ids supported by platform, if not the first n + * @reg_offsets: Register offsets for commonly used registers */ struct tsens_data { const u32 num_sensors; const struct tsens_ops *ops; + const u16 reg_offsets[REG_ARRAY_SIZE]; unsigned int *hw_ids; }; @@ -76,8 +77,10 @@ struct tsens_context { struct tsens_device { struct device *dev; u32 num_sensors; - struct regmap *map; + struct regmap *tm_map; + struct regmap *srot_map; u32 tm_offset; + u16 reg_offsets[REG_ARRAY_SIZE]; struct tsens_context ctx; const struct tsens_ops *ops; struct tsens_sensor sensor[0]; diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c index 450ed66edf58..18c711b19514 100644 --- a/drivers/thermal/qoriq_thermal.c +++ b/drivers/thermal/qoriq_thermal.c @@ -119,8 +119,8 @@ static int qoriq_tmu_get_sensor_id(void) if (sensor_specs.args_count >= 1) { id = sensor_specs.args[0]; WARN(sensor_specs.args_count > 1, - "%s: too many cells in sensor specifier %d\n", - sensor_specs.np->name, sensor_specs.args_count); + "%pOFn: too many cells in sensor specifier %d\n", + sensor_specs.np, sensor_specs.args_count); } else { id = 0; } @@ -294,6 +294,7 @@ static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops, static const struct of_device_id qoriq_tmu_match[] = { { .compatible = "fsl,qoriq-tmu", }, + { .compatible = "fsl,imx8mq-tmu", }, {}, }; MODULE_DEVICE_TABLE(of, qoriq_tmu_match); diff --git a/drivers/thermal/rcar_gen3_thermal.c b/drivers/thermal/rcar_gen3_thermal.c index 7aed5337bdd3..75786cc8e2f9 100644 --- a/drivers/thermal/rcar_gen3_thermal.c +++ b/drivers/thermal/rcar_gen3_thermal.c @@ -318,9 +318,11 @@ static void rcar_gen3_thermal_init(struct rcar_gen3_thermal_tsc *tsc) } static const struct of_device_id rcar_gen3_thermal_dt_ids[] = { + { .compatible = "renesas,r8a774a1-thermal", }, { .compatible = "renesas,r8a7795-thermal", }, { .compatible = "renesas,r8a7796-thermal", }, { .compatible = "renesas,r8a77965-thermal", }, + { .compatible = "renesas,r8a77980-thermal", }, {}, }; MODULE_DEVICE_TABLE(of, rcar_gen3_thermal_dt_ids); diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c index 78f932822d38..8014a207d8d9 100644 --- a/drivers/thermal/rcar_thermal.c +++ b/drivers/thermal/rcar_thermal.c @@ -113,6 +113,10 @@ static const struct of_device_id rcar_thermal_dt_ids[] = { .data = &rcar_gen2_thermal, }, { + .compatible = "renesas,thermal-r8a77970", + .data = &rcar_gen3_thermal, + }, + { .compatible = "renesas,thermal-r8a77995", .data = &rcar_gen3_thermal, }, @@ -434,8 +438,8 @@ static irqreturn_t rcar_thermal_irq(int irq, void *data) rcar_thermal_for_each_priv(priv, common) { if (rcar_thermal_had_changed(priv, status)) { rcar_thermal_irq_disable(priv); - schedule_delayed_work(&priv->work, - msecs_to_jiffies(300)); + queue_delayed_work(system_freezable_wq, &priv->work, + msecs_to_jiffies(300)); } } @@ -453,6 +457,7 @@ static int rcar_thermal_remove(struct platform_device *pdev) rcar_thermal_for_each_priv(priv, common) { rcar_thermal_irq_disable(priv); + cancel_delayed_work_sync(&priv->work); if (priv->chip->use_of_thermal) thermal_remove_hwmon_sysfs(priv->zone); else @@ -492,7 +497,7 @@ static int rcar_thermal_probe(struct platform_device *pdev) pm_runtime_get_sync(dev); for (i = 0; i < chip->nirqs; i++) { - irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + irq = platform_get_resource(pdev, IORESOURCE_IRQ, i); if (!irq) continue; if (!common->base) { diff --git a/drivers/thermal/st/Kconfig b/drivers/thermal/st/Kconfig index 490fdbe22eea..b80f9a9e4f8f 100644 --- a/drivers/thermal/st/Kconfig +++ b/drivers/thermal/st/Kconfig @@ -1,3 +1,7 @@ +# +# STMicroelectronics thermal drivers configuration +# + config ST_THERMAL tristate "Thermal sensors on STMicroelectronics STi series of SoCs" help @@ -10,3 +14,13 @@ config ST_THERMAL_SYSCFG config ST_THERMAL_MEMMAP select ST_THERMAL tristate "STi series memory mapped access based thermal sensors" + +config STM32_THERMAL + tristate "Thermal framework support on STMicroelectronics STM32 series of SoCs" + depends on MACH_STM32MP157 + default y + help + Support for thermal framework on STMicroelectronics STM32 series of + SoCs. This thermal driver allows to access to general thermal framework + functionalities and to acces to SoC sensor functionalities. This + configuration is fully dependent of MACH_STM32MP157. diff --git a/drivers/thermal/st/Makefile b/drivers/thermal/st/Makefile index b38878977bd8..b2b9e9b96296 100644 --- a/drivers/thermal/st/Makefile +++ b/drivers/thermal/st/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_ST_THERMAL) := st_thermal.o obj-$(CONFIG_ST_THERMAL_SYSCFG) += st_thermal_syscfg.o obj-$(CONFIG_ST_THERMAL_MEMMAP) += st_thermal_memmap.o +obj-$(CONFIG_STM32_THERMAL) := stm_thermal.o \ No newline at end of file diff --git a/drivers/thermal/st/stm_thermal.c b/drivers/thermal/st/stm_thermal.c new file mode 100644 index 000000000000..47623da0f91b --- /dev/null +++ b/drivers/thermal/st/stm_thermal.c @@ -0,0 +1,760 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) STMicroelectronics 2018 - All Rights Reserved + * Author: David Hernandez Sanchez <david.hernandezsanchez@st.com> for + * STMicroelectronics. + */ + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> + +#include "../thermal_core.h" +#include "../thermal_hwmon.h" + +/* DTS register offsets */ +#define DTS_CFGR1_OFFSET 0x0 +#define DTS_T0VALR1_OFFSET 0x8 +#define DTS_RAMPVALR_OFFSET 0X10 +#define DTS_ITR1_OFFSET 0x14 +#define DTS_DR_OFFSET 0x1C +#define DTS_SR_OFFSET 0x20 +#define DTS_ITENR_OFFSET 0x24 +#define DTS_CIFR_OFFSET 0x28 + +/* DTS_CFGR1 register mask definitions */ +#define HSREF_CLK_DIV_MASK GENMASK(30, 24) +#define TS1_SMP_TIME_MASK GENMASK(19, 16) +#define TS1_INTRIG_SEL_MASK GENMASK(11, 8) + +/* DTS_T0VALR1 register mask definitions */ +#define TS1_T0_MASK GENMASK(17, 16) +#define TS1_FMT0_MASK GENMASK(15, 0) + +/* DTS_RAMPVALR register mask definitions */ +#define TS1_RAMP_COEFF_MASK GENMASK(15, 0) + +/* DTS_ITR1 register mask definitions */ +#define TS1_HITTHD_MASK GENMASK(31, 16) +#define TS1_LITTHD_MASK GENMASK(15, 0) + +/* DTS_DR register mask definitions */ +#define TS1_MFREQ_MASK GENMASK(15, 0) + +/* Less significant bit position definitions */ +#define TS1_T0_POS 16 +#define TS1_SMP_TIME_POS 16 +#define TS1_HITTHD_POS 16 +#define HSREF_CLK_DIV_POS 24 + +/* DTS_CFGR1 bit definitions */ +#define TS1_EN BIT(0) +#define TS1_START BIT(4) +#define REFCLK_SEL BIT(20) +#define REFCLK_LSE REFCLK_SEL +#define Q_MEAS_OPT BIT(21) +#define CALIBRATION_CONTROL Q_MEAS_OPT + +/* DTS_SR bit definitions */ +#define TS_RDY BIT(15) +/* Bit definitions below are common for DTS_SR, DTS_ITENR and DTS_CIFR */ +#define HIGH_THRESHOLD BIT(2) +#define LOW_THRESHOLD BIT(1) + +/* Constants */ +#define ADJUST 100 +#define ONE_MHZ 1000000 +#define POLL_TIMEOUT 5000 +#define STARTUP_TIME 40 +#define TS1_T0_VAL0 30 +#define TS1_T0_VAL1 130 +#define NO_HW_TRIG 0 + +/* The Thermal Framework expects millidegrees */ +#define mcelsius(temp) ((temp) * 1000) + +/* The Sensor expects oC degrees */ +#define celsius(temp) ((temp) / 1000) + +struct stm_thermal_sensor { + struct device *dev; + struct thermal_zone_device *th_dev; + enum thermal_device_mode mode; + struct clk *clk; + int high_temp; + int low_temp; + int temp_critical; + int temp_passive; + unsigned int low_temp_enabled; + int num_trips; + int irq; + unsigned int irq_enabled; + void __iomem *base; + int t0, fmt0, ramp_coeff; +}; + +static irqreturn_t stm_thermal_alarm_irq(int irq, void *sdata) +{ + struct stm_thermal_sensor *sensor = sdata; + + disable_irq_nosync(irq); + sensor->irq_enabled = false; + + return IRQ_WAKE_THREAD; +} + +static irqreturn_t stm_thermal_alarm_irq_thread(int irq, void *sdata) +{ + u32 value; + struct stm_thermal_sensor *sensor = sdata; + + /* read IT reason in SR and clear flags */ + value = readl_relaxed(sensor->base + DTS_SR_OFFSET); + + if ((value & LOW_THRESHOLD) == LOW_THRESHOLD) + writel_relaxed(LOW_THRESHOLD, sensor->base + DTS_CIFR_OFFSET); + + if ((value & HIGH_THRESHOLD) == HIGH_THRESHOLD) + writel_relaxed(HIGH_THRESHOLD, sensor->base + DTS_CIFR_OFFSET); + + thermal_zone_device_update(sensor->th_dev, THERMAL_EVENT_UNSPECIFIED); + + return IRQ_HANDLED; +} + +static int stm_sensor_power_on(struct stm_thermal_sensor *sensor) +{ + int ret; + u32 value; + + /* Enable sensor */ + value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET); + value |= TS1_EN; + writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET); + + /* + * The DTS block can be enabled by setting TSx_EN bit in + * DTS_CFGRx register. It requires a startup time of + * 40μs. Use 5 ms as arbitrary timeout. + */ + ret = readl_poll_timeout(sensor->base + DTS_SR_OFFSET, + value, (value & TS_RDY), + STARTUP_TIME, POLL_TIMEOUT); + if (ret) + return ret; + + /* Start continuous measuring */ + value = readl_relaxed(sensor->base + + DTS_CFGR1_OFFSET); + value |= TS1_START; + writel_relaxed(value, sensor->base + + DTS_CFGR1_OFFSET); + + return 0; +} + +static int stm_sensor_power_off(struct stm_thermal_sensor *sensor) +{ + u32 value; + + /* Stop measuring */ + value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET); + value &= ~TS1_START; + writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET); + + /* Ensure stop is taken into account */ + usleep_range(STARTUP_TIME, POLL_TIMEOUT); + + /* Disable sensor */ + value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET); + value &= ~TS1_EN; + writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET); + + /* Ensure disable is taken into account */ + return readl_poll_timeout(sensor->base + DTS_SR_OFFSET, value, + !(value & TS_RDY), + STARTUP_TIME, POLL_TIMEOUT); +} + +static int stm_thermal_calibration(struct stm_thermal_sensor *sensor) +{ + u32 value, clk_freq; + u32 prescaler; + + /* Figure out prescaler value for PCLK during calibration */ + clk_freq = clk_get_rate(sensor->clk); + if (!clk_freq) + return -EINVAL; + + prescaler = 0; + clk_freq /= ONE_MHZ; + if (clk_freq) { + while (prescaler <= clk_freq) + prescaler++; + } + + value = readl_relaxed(sensor->base + DTS_CFGR1_OFFSET); + + /* Clear prescaler */ + value &= ~HSREF_CLK_DIV_MASK; + + /* Set prescaler. pclk_freq/prescaler < 1MHz */ + value |= (prescaler << HSREF_CLK_DIV_POS); + + /* Select PCLK as reference clock */ + value &= ~REFCLK_SEL; + + /* Set maximal sampling time for better precision */ + value |= TS1_SMP_TIME_MASK; + + /* Measure with calibration */ + value &= ~CALIBRATION_CONTROL; + + /* select trigger */ + value &= ~TS1_INTRIG_SEL_MASK; + value |= NO_HW_TRIG; + + writel_relaxed(value, sensor->base + DTS_CFGR1_OFFSET); + + return 0; +} + +/* Fill in DTS structure with factory sensor values */ +static int stm_thermal_read_factory_settings(struct stm_thermal_sensor *sensor) +{ + /* Retrieve engineering calibration temperature */ + sensor->t0 = readl_relaxed(sensor->base + DTS_T0VALR1_OFFSET) & + TS1_T0_MASK; + if (!sensor->t0) + sensor->t0 = TS1_T0_VAL0; + else + sensor->t0 = TS1_T0_VAL1; + + /* Retrieve fmt0 and put it on Hz */ + sensor->fmt0 = ADJUST * readl_relaxed(sensor->base + DTS_T0VALR1_OFFSET) + & TS1_FMT0_MASK; + + /* Retrieve ramp coefficient */ + sensor->ramp_coeff = readl_relaxed(sensor->base + DTS_RAMPVALR_OFFSET) & + TS1_RAMP_COEFF_MASK; + + if (!sensor->fmt0 || !sensor->ramp_coeff) { + dev_err(sensor->dev, "%s: wrong setting\n", __func__); + return -EINVAL; + } + + dev_dbg(sensor->dev, "%s: T0 = %doC, FMT0 = %dHz, RAMP_COEFF = %dHz/oC", + __func__, sensor->t0, sensor->fmt0, sensor->ramp_coeff); + + return 0; +} + +static int stm_thermal_calculate_threshold(struct stm_thermal_sensor *sensor, + int temp, u32 *th) +{ + int freqM; + u32 sampling_time; + + /* Retrieve the number of periods to sample */ + sampling_time = (readl_relaxed(sensor->base + DTS_CFGR1_OFFSET) & + TS1_SMP_TIME_MASK) >> TS1_SMP_TIME_POS; + + /* Figure out the CLK_PTAT frequency for a given temperature */ + freqM = ((temp - sensor->t0) * sensor->ramp_coeff) + + sensor->fmt0; + + dev_dbg(sensor->dev, "%s: freqM for threshold = %d Hz", + __func__, freqM); + + /* Figure out the threshold sample number */ + *th = clk_get_rate(sensor->clk); + if (!*th) + return -EINVAL; + + *th = *th / freqM; + + *th *= sampling_time; + + return 0; +} + +static int stm_thermal_set_threshold(struct stm_thermal_sensor *sensor) +{ + u32 value, th; + int ret; + + value = readl_relaxed(sensor->base + DTS_ITR1_OFFSET); + + /* Erase threshold content */ + value &= ~(TS1_LITTHD_MASK | TS1_HITTHD_MASK); + + /* Retrieve the sample threshold number th for a given temperature */ + ret = stm_thermal_calculate_threshold(sensor, sensor->high_temp, &th); + if (ret) + return ret; + + value |= th & TS1_LITTHD_MASK; + + if (sensor->low_temp_enabled) { + /* Retrieve the sample threshold */ + ret = stm_thermal_calculate_threshold(sensor, sensor->low_temp, + &th); + if (ret) + return ret; + + value |= (TS1_HITTHD_MASK & (th << TS1_HITTHD_POS)); + } + + /* Write value on the Low interrupt threshold */ + writel_relaxed(value, sensor->base + DTS_ITR1_OFFSET); + + return 0; +} + +/* Disable temperature interrupt */ +static int stm_disable_irq(struct stm_thermal_sensor *sensor) +{ + u32 value; + + /* Disable IT generation for low and high thresholds */ + value = readl_relaxed(sensor->base + DTS_ITENR_OFFSET); + writel_relaxed(value & ~(LOW_THRESHOLD | HIGH_THRESHOLD), + sensor->base + DTS_ITENR_OFFSET); + + dev_dbg(sensor->dev, "%s: IT disabled on sensor side", __func__); + + return 0; +} + +/* Enable temperature interrupt */ +static int stm_enable_irq(struct stm_thermal_sensor *sensor) +{ + u32 value; + + /* + * Code below enables High temperature threshold using a low threshold + * sampling value + */ + + /* Make sure LOW_THRESHOLD IT is clear before enabling */ + writel_relaxed(LOW_THRESHOLD, sensor->base + DTS_CIFR_OFFSET); + + /* Enable IT generation for low threshold */ + value = readl_relaxed(sensor->base + DTS_ITENR_OFFSET); + value |= LOW_THRESHOLD; + + /* Enable the low temperature threshold if needed */ + if (sensor->low_temp_enabled) { + /* Make sure HIGH_THRESHOLD IT is clear before enabling */ + writel_relaxed(HIGH_THRESHOLD, sensor->base + DTS_CIFR_OFFSET); + + /* Enable IT generation for high threshold */ + value |= HIGH_THRESHOLD; + } + + /* Enable thresholds */ + writel_relaxed(value, sensor->base + DTS_ITENR_OFFSET); + + dev_dbg(sensor->dev, "%s: IT enabled on sensor side", __func__); + + return 0; +} + +static int stm_thermal_update_threshold(struct stm_thermal_sensor *sensor) +{ + int ret; + + sensor->mode = THERMAL_DEVICE_DISABLED; + + ret = stm_sensor_power_off(sensor); + if (ret) + return ret; + + ret = stm_disable_irq(sensor); + if (ret) + return ret; + + ret = stm_thermal_set_threshold(sensor); + if (ret) + return ret; + + ret = stm_enable_irq(sensor); + if (ret) + return ret; + + ret = stm_sensor_power_on(sensor); + if (ret) + return ret; + + sensor->mode = THERMAL_DEVICE_ENABLED; + + return 0; +} + +/* Callback to get temperature from HW */ +static int stm_thermal_get_temp(void *data, int *temp) +{ + struct stm_thermal_sensor *sensor = data; + u32 sampling_time; + int freqM, ret; + + if (sensor->mode != THERMAL_DEVICE_ENABLED) + return -EAGAIN; + + /* Retrieve the number of samples */ + ret = readl_poll_timeout(sensor->base + DTS_DR_OFFSET, freqM, + (freqM & TS1_MFREQ_MASK), STARTUP_TIME, + POLL_TIMEOUT); + + if (ret) + return ret; + + if (!freqM) + return -ENODATA; + + /* Retrieve the number of periods sampled */ + sampling_time = (readl_relaxed(sensor->base + DTS_CFGR1_OFFSET) & + TS1_SMP_TIME_MASK) >> TS1_SMP_TIME_POS; + + /* Figure out the number of samples per period */ + freqM /= sampling_time; + + /* Figure out the CLK_PTAT frequency */ + freqM = clk_get_rate(sensor->clk) / freqM; + if (!freqM) + return -EINVAL; + + dev_dbg(sensor->dev, "%s: freqM=%d\n", __func__, freqM); + + /* Figure out the temperature in mili celsius */ + *temp = mcelsius(sensor->t0 + ((freqM - sensor->fmt0) / + sensor->ramp_coeff)); + + dev_dbg(sensor->dev, "%s: temperature = %d millicelsius", + __func__, *temp); + + /* Update thresholds */ + if (sensor->num_trips > 1) { + /* Update alarm threshold value to next higher trip point */ + if (sensor->high_temp == sensor->temp_passive && + celsius(*temp) >= sensor->temp_passive) { + sensor->high_temp = sensor->temp_critical; + sensor->low_temp = sensor->temp_passive; + sensor->low_temp_enabled = true; + ret = stm_thermal_update_threshold(sensor); + if (ret) + return ret; + } + + if (sensor->high_temp == sensor->temp_critical && + celsius(*temp) < sensor->temp_passive) { + sensor->high_temp = sensor->temp_passive; + sensor->low_temp_enabled = false; + ret = stm_thermal_update_threshold(sensor); + if (ret) + return ret; + } + + /* + * Re-enable alarm IRQ if temperature below critical + * temperature + */ + if (!sensor->irq_enabled && + (celsius(*temp) < sensor->temp_critical)) { + sensor->irq_enabled = true; + enable_irq(sensor->irq); + } + } + + return 0; +} + +/* Registers DTS irq to be visible by GIC */ +static int stm_register_irq(struct stm_thermal_sensor *sensor) +{ + struct device *dev = sensor->dev; + struct platform_device *pdev = to_platform_device(dev); + int ret; + + sensor->irq = platform_get_irq(pdev, 0); + if (sensor->irq < 0) { + dev_err(dev, "%s: Unable to find IRQ\n", __func__); + return sensor->irq; + } + + ret = devm_request_threaded_irq(dev, sensor->irq, + stm_thermal_alarm_irq, + stm_thermal_alarm_irq_thread, + IRQF_ONESHOT, + dev->driver->name, sensor); + if (ret) { + dev_err(dev, "%s: Failed to register IRQ %d\n", __func__, + sensor->irq); + return ret; + } + + sensor->irq_enabled = true; + + dev_dbg(dev, "%s: thermal IRQ registered", __func__); + + return 0; +} + +static int stm_thermal_sensor_off(struct stm_thermal_sensor *sensor) +{ + int ret; + + ret = stm_sensor_power_off(sensor); + if (ret) + return ret; + + clk_disable_unprepare(sensor->clk); + + return 0; +} + +static int stm_thermal_prepare(struct stm_thermal_sensor *sensor) +{ + int ret; + struct device *dev = sensor->dev; + + ret = clk_prepare_enable(sensor->clk); + if (ret) + return ret; + + ret = stm_thermal_calibration(sensor); + if (ret) + goto thermal_unprepare; + + /* Set threshold(s) for IRQ */ + ret = stm_thermal_set_threshold(sensor); + if (ret) + goto thermal_unprepare; + + ret = stm_enable_irq(sensor); + if (ret) + goto thermal_unprepare; + + ret = stm_sensor_power_on(sensor); + if (ret) { + dev_err(dev, "%s: failed to power on sensor\n", __func__); + goto irq_disable; + } + + return 0; + +irq_disable: + stm_disable_irq(sensor); + +thermal_unprepare: + clk_disable_unprepare(sensor->clk); + + return ret; +} + +#ifdef CONFIG_PM_SLEEP +static int stm_thermal_suspend(struct device *dev) +{ + int ret; + struct platform_device *pdev = to_platform_device(dev); + struct stm_thermal_sensor *sensor = platform_get_drvdata(pdev); + + ret = stm_thermal_sensor_off(sensor); + if (ret) + return ret; + + sensor->mode = THERMAL_DEVICE_DISABLED; + + return 0; +} + +static int stm_thermal_resume(struct device *dev) +{ + int ret; + struct platform_device *pdev = to_platform_device(dev); + struct stm_thermal_sensor *sensor = platform_get_drvdata(pdev); + + ret = stm_thermal_prepare(sensor); + if (ret) + return ret; + + sensor->mode = THERMAL_DEVICE_ENABLED; + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +SIMPLE_DEV_PM_OPS(stm_thermal_pm_ops, stm_thermal_suspend, stm_thermal_resume); + +static const struct thermal_zone_of_device_ops stm_tz_ops = { + .get_temp = stm_thermal_get_temp, +}; + +static const struct of_device_id stm_thermal_of_match[] = { + { .compatible = "st,stm32-thermal"}, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, stm_thermal_of_match); + +static int stm_thermal_probe(struct platform_device *pdev) +{ + struct stm_thermal_sensor *sensor; + struct resource *res; + const struct thermal_trip *trip; + void __iomem *base; + int ret, i; + + if (!pdev->dev.of_node) { + dev_err(&pdev->dev, "%s: device tree node not found\n", + __func__); + return -EINVAL; + } + + sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL); + if (!sensor) + return -ENOMEM; + + platform_set_drvdata(pdev, sensor); + + sensor->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + /* Populate sensor */ + sensor->base = base; + + ret = stm_thermal_read_factory_settings(sensor); + if (ret) + return ret; + + sensor->clk = devm_clk_get(&pdev->dev, "pclk"); + if (IS_ERR(sensor->clk)) { + dev_err(&pdev->dev, "%s: failed to fetch PCLK clock\n", + __func__); + return PTR_ERR(sensor->clk); + } + + /* Register IRQ into GIC */ + ret = stm_register_irq(sensor); + if (ret) + return ret; + + sensor->th_dev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, + sensor, + &stm_tz_ops); + + if (IS_ERR(sensor->th_dev)) { + dev_err(&pdev->dev, "%s: thermal zone sensor registering KO\n", + __func__); + ret = PTR_ERR(sensor->th_dev); + return ret; + } + + if (!sensor->th_dev->ops->get_crit_temp) { + /* Critical point must be provided */ + ret = -EINVAL; + goto err_tz; + } + + ret = sensor->th_dev->ops->get_crit_temp(sensor->th_dev, + &sensor->temp_critical); + if (ret) { + dev_err(&pdev->dev, + "Not able to read critical_temp: %d\n", ret); + goto err_tz; + } + + sensor->temp_critical = celsius(sensor->temp_critical); + + /* Set thresholds for IRQ */ + sensor->high_temp = sensor->temp_critical; + + trip = of_thermal_get_trip_points(sensor->th_dev); + sensor->num_trips = of_thermal_get_ntrips(sensor->th_dev); + + /* Find out passive temperature if it exists */ + for (i = (sensor->num_trips - 1); i >= 0; i--) { + if (trip[i].type == THERMAL_TRIP_PASSIVE) { + sensor->temp_passive = celsius(trip[i].temperature); + /* Update high temperature threshold */ + sensor->high_temp = sensor->temp_passive; + } + } + + /* + * Ensure low_temp_enabled flag is disabled. + * By disabling low_temp_enabled, low threshold IT will not be + * configured neither enabled because it is not needed as high + * threshold is set on the lowest temperature trip point after + * probe. + */ + sensor->low_temp_enabled = false; + + /* Configure and enable HW sensor */ + ret = stm_thermal_prepare(sensor); + if (ret) { + dev_err(&pdev->dev, + "Not able to enable sensor: %d\n", ret); + goto err_tz; + } + + /* + * Thermal_zone doesn't enable hwmon as default, + * enable it here + */ + sensor->th_dev->tzp->no_hwmon = false; + ret = thermal_add_hwmon_sysfs(sensor->th_dev); + if (ret) + goto err_tz; + + sensor->mode = THERMAL_DEVICE_ENABLED; + + dev_info(&pdev->dev, "%s: Driver initialized successfully\n", + __func__); + + return 0; + +err_tz: + thermal_zone_of_sensor_unregister(&pdev->dev, sensor->th_dev); + return ret; +} + +static int stm_thermal_remove(struct platform_device *pdev) +{ + struct stm_thermal_sensor *sensor = platform_get_drvdata(pdev); + + stm_thermal_sensor_off(sensor); + thermal_remove_hwmon_sysfs(sensor->th_dev); + thermal_zone_of_sensor_unregister(&pdev->dev, sensor->th_dev); + + return 0; +} + +static struct platform_driver stm_thermal_driver = { + .driver = { + .name = "stm_thermal", + .pm = &stm_thermal_pm_ops, + .of_match_table = stm_thermal_of_match, + }, + .probe = stm_thermal_probe, + .remove = stm_thermal_remove, +}; +module_platform_driver(stm_thermal_driver); + +MODULE_DESCRIPTION("STMicroelectronics STM32 Thermal Sensor Driver"); +MODULE_AUTHOR("David Hernandez Sanchez <david.hernandezsanchez@st.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:stm_thermal"); |